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Super-resolution Fluorescence Microscopy

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Super-resolution fluorescence microscopy (SRFM) provides a better resolution than conventional fluorescence microscopy by reducing the point spread function (PSF). PSF is the light intensity distribution from a point that causes it to appear blurred. Due to PSF, each fluorescing point appears bigger than its actual size, and it is the PSF interference of nearby fluorophores that causes the blurred image. Various approaches to achieving higher resolution through SRFM have recently been...

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A Guide to Structured Illumination TIRF Microscopy at High Speed with Multiple Colors

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High-speed single-pixel imaging by frequency-time-division multiplexing.

Hiroshi Kanno, Hideharu Mikami, Keisuke Goda

|April 15, 2020

Summary

This summary is machine-generated.

We developed high-speed single-pixel imaging using frequency-time-division multiplexing (FTDM). This method achieves ultrafast microscopy and velocimetry, enabling rapid imaging of biological samples and particle flow.

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Area of Science:

Optics and Photonics
Biomedical Imaging
Signal Processing

Background:

Single-pixel imaging offers a cost-effective alternative to traditional cameras.
High-speed imaging is crucial for dynamic processes in biology and fluid dynamics.
Multiplexing techniques from telecommunications can enhance imaging speed and dimensionality.

Purpose of the Study:

To introduce and demonstrate frequency-time-division multiplexing (FTDM) for high-speed single-pixel optical imaging.
To achieve ultrafast imaging of biological samples and fast-moving particles.
To validate the FTDM approach for advanced microscopy and velocimetry applications.

Main Methods:

Integration of frequency-division multiplexing and time-division multiplexing into a single-pixel imaging framework.
Utilizing broadband, spatially distributed dual-frequency combs for multidimensional illumination.
Employing a single-pixel photodetector to capture time-domain signals encoded by FTDM.

Main Results:

Successful demonstration of ultrafast two-color single-pixel microscopy of breast cancer cells at 32,000 frames per second.
Achieved ultrafast image velocimetry of fluorescent particles exceeding 2 m/s.
Validated the efficacy of FTDM for high-speed, multidimensional optical imaging.

Conclusions:

FTDM single-pixel imaging is a powerful technique for high-speed, high-resolution optical imaging.
The method opens new possibilities for real-time biological imaging and fluid dynamics studies.
FTDM offers a promising platform for future advancements in optical microscopy and velocimetry.